Electronic blackboard



FIG. 1 is a front, top, and right side perspective view of an electronic blackboard;

FIG. 2 is a rear, top, and right side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a right side elevational view thereof.

The broken lines in the drawings illustrate environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an electronic blackboard, as shown and described. 